Hmm, now I don't know why I wrote that POLLPRI was returned, it should
be POLLIN and that's what my test program currently shows on Nemo and
non-Nemo devices.  I probably just typed the wrong thing.  Do you really
see POLLPRI returned?  You could poll for both, of course, but the
puzzle here is that the behavior shouldn't have changed anyway.

If there is some circumstance wherein you will cause the provider to
generate an M_PCPROTO message, such as by sending an DL_INFO_REQ,
that will cause the stream to start reporting POLLPRI instead of
POLLIN until you read the M_PCPROTO message.  Polling for both events
is one way to get past this.  But again, I think this hasn't changed
with S10 or Nemo, so I don't see why that would be your problem.

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